Ultrasonic Power/Data Telemetry and Neural Stimulator With OOK-PM Signaling

2013 ◽  
Vol 60 (12) ◽  
pp. 827-831 ◽  
Author(s):  
Ye-Sing Luo ◽  
Jiun-Ru Wang ◽  
Wei-Jen Huang ◽  
Je-Yu Tsai ◽  
Yi-Fang Liao ◽  
...  
Keyword(s):  
Ultrasonic Power ◽  
Neural Stimulator

Convective drying of lemon peel assisted by power ultrasound: influence of ultrasonic power applied

2007 ◽  
Author(s):  
Antonio Mulet ◽  
Juan A. Cárcel ◽  
Susana De la Fuente-Blanco ◽  
Enrique Riera-Franco de Sarabia ◽  
José V. García-Pérez
Keyword(s):  
Convective Drying ◽  
Ultrasonic Power ◽  
Power Ultrasound ◽  
Lemon Peel

scholarly journals Ultrasonication of Thawed Huyou Juice: Effects on Cloud Stability, Physicochemical Properties and Bioactive Compounds

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1695
Author(s):  
Xinyue Zhou ◽  
Wenjun Wang ◽  
Xiaobin Ma ◽  
Enbo Xu ◽  
Donghong Liu
Keyword(s):  
Physicochemical Properties ◽  
Bioactive Compounds ◽  
Ultrasonic Treatment ◽  
Frozen Storage ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Ultrasonic Power ◽  
Minimal Impact ◽  
Sedimentation Behavior ◽  
Thawing Process

In order to remove the flocculent precipitation in Huyou juice after frozen storage and thawing process, the thawed juice was ultrasonically treated with different power (45–360 W) and time (10–60 min) in ice bath (~0 °C), and its sedimentation behavior during storage was observed. After optimization, the cloud stability of juice could be improved by ultrasonic treatment with ultrasonic power of 360 W or more for at least 30 min, which could be stable during 7 days of storage at 4 °C. Under this optimal condition (360 W, 30 min), the effects of ultrasound on the physicochemical properties and bioactive compounds of thawed Huyou juice during storage were investigated. The results showed that with smaller particle size and lower polymer dispersity index, ultrasonic treatment did not significantly change the color, soluble solids, titratable acidity, and bioactive compounds including flavonoids and other phenolics. In addition, all properties of samples were at the same level during storage. Thus, ultrasound was applicable since it can improve the cloud stability of Huyou juice with minimal impact on its physicochemical properties and nutritional quality compared to the untreated one.

scholarly journals Optimization of Ultrasonic-Assisted Extraction, Characterization, and Antioxidant Activities of Polysaccharides From Sojae Semen Praeparatum

2021 ◽  
Vol 16 (5) ◽  
pp. 1934578X2110206
Author(s):  
Yongshuai Jing ◽  
Ruijuan Zhang ◽  
Lan Li ◽  
Danshen Zhang ◽  
Yu Liu ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Deae Cellulose ◽  
Chemical Compositions ◽  
Hydroxyl Groups ◽  
Ultrasonic Frequency ◽  
Ultrasonic Power ◽  
Assisted Extraction ◽  
Ultrasonic Time ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction

In this study, response surface methodology (RSM) was used to optimize the ultrasonic-assisted extraction parameters of Sojae Semen Praeparatum polysaccharides (SSPP-80), the optimum conditions were determined as follows: ultrasonic frequency of 100 W, ultrasonic power of 80 Hz, ultrasonic temperature of 52℃, ultrasonic time of 23 minutes, and liquid to raw material ratio of 40 mL/g. Based on these conditions, polysaccharides extraction rate was 7.72% ± 0.26%. Then, 2 novel polysaccharides (SSPP-80‐1, SSPP-80‐2) were isolated from SSPP by DEAE-cellulose 52 chromatography. The chemical compositions, physicochemical properties, and structure of SSPPs were investigated by simultaneous thermal analyzer (TGA), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FI-IR), and high-performance liquid chromatography (HPLC). The results showed that SSPP-80 and 2 fractions were mainly composed of mannose (Man), glucose (Glc), galactose (Gal), xylose (Xyl), and arabinose (Ara). In addition, the antioxidant activities were evaluated against the DPPH and hydroxyl radical in vitro, the IC50 of SSPP-80, SSPP-80‐1 and SSPP-80‐2 against DPPH free radical were 4.407, 8.267, and 5.204 mg/mL, respectively, whereas the IC50values for removing hydroxyl groups were 5.318, 3.516, and 4.016 mg/mL, respectively. It demonstrated that SSPP-80 and 2 fractions had certain antioxidant activity. Theoretical basis for use of Sojae Semen Praeparatum polysaccharides was provided by this study.

Process Optimization of the Preparation of TiO2 Microcapsule Used for Photo-Catalytic Degradation with Ultrasound Irradiation

2012 ◽  
Vol 627 ◽  
pp. 770-774
Author(s):  
Xiao Mei Wang ◽  
Bao Bao Zhao ◽  
Cheng Rong Zhang
Keyword(s):  
Process Optimization ◽  
Ultrasound Irradiation ◽  
Core Material ◽  
Wall Material ◽  
Ultrasonic Power ◽  
Complex Coacervation ◽  
Photo Degradation ◽  
Reaction Solution ◽  
Ultrasonic Time ◽  
Ultrasonic Conditions

Microcapsules were prepared using the complex coacervation method with nano anatase TiO2 as the core material, gelatin/Arabia gum as the wall material, while dispersing TiO2 into the reaction solution using the ultrasonic. The prepared microcapsules can be finished into textiles such as the polypropylene nonwovens, and the microcapsules in the textiles gradually fracture and the anatase TiO2 was released, which would facilitate photo-degradation of the polypropylene nonwovens when exposed in sunlight. The microcapsules size was used as the process optimization evaluation index, and the quadratic general revolving combination design was used to conduct the experiments for obtaining the optimum ultrasonic conditions, and the other progress parameters were the same that used in our early microcapsule preparation. The obtained optimal process for ultrasound is: ultrasonic time is 17min; ultrasonic power is 74W and ultrasound temperature 60 °C.

Optimization of Chlorella pyrenoidosa Removal by Low Frequency Ultrasonic Irradiation Using Response Surface Design

2011 ◽  
Vol 295-297 ◽  
pp. 1860-1865 ◽  
Author(s):  
Zhi Zhang ◽  
Chao Liu ◽  
Gong Duan Fan ◽  
Jing Luo ◽  
Yan Dong Wang
Keyword(s):  
Response Surface ◽  
Irradiation Time ◽  
Removal Rate ◽  
Low Frequency ◽  
Chlorella Pyrenoidosa ◽  
Ultrasonic Frequency ◽  
Ultrasonic Power ◽  
Control Parameters ◽  
Single Factor ◽  
Surface Design

The control parameters of the removal of Chlorella pyrenoidosa, which was irradiated by low frequency ultrasonic, is optimized by using single factor experiments and response surface methodology (RSM). First of all, the approximate ranges of the ultrasonic frequency, the ultrasonic power and the irradiation time were estimated with single factor experiments for the further experiments. And then the optimized values of the three control parameters were determined, which were analyzed by using central composite design (CCD) and RSM. The results showed that the removal rate of chlorophyll-a could reach to 64.1% after the irradiation for 6.34min by using ultrasonic of 77.7 kHz and 250W. Ultrasonic technology can remove Chlorella pyrenoidosa cells in water quickly and effectively, so as to achieve the purpose of water purification.

The Dispersion of MWCNTS in Acetone Solution of SAN

2015 ◽  
Vol 1088 ◽  
pp. 8-12
Author(s):  
Xin Long Ling ◽  
Ling Jiao Xie ◽  
Li Ming Zou ◽  
Yi Zhe Wei
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Acetone Solution ◽  
Average Particle ◽  
Ultrasonic Power ◽  
Acrylonitrile Copolymer ◽  
Mass Percent ◽  
Ultrasonic Time ◽  
Styrene Acrylonitrile

MWCNTs were dispersed in acetone solution of styrene-acrylonitrile copolymer (SAN). Four factors which had effect on the average particle size, including the ratio of MWCNTs to SAN, the mass percent of MWCNTs, the ultrasonic power and the ultrasonic time, were studied. The optimal dispersion conditions of MWCNTs in acetone solution of SAN were the ratio of MWCNTs to SAN 1:3, the mass percent of MWCNTs 0.25%, the ultrasonic power 100%, and the ultrasonic time 30 min.

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